"Error copying the file"

i use drupal 5 with the modules TinyMCE and IMCE, because my Website-Users should be able to upload their own pictures with TinyMCE and MCE.

The IMCE-Modul creates the personal folders in the folder “uploads, for the users who want to upload a picture. But when the users try to upload a file, they get the following message: “Error copying the file”.
So i looked at these folders with my ftp-program and i saw that the Folder "upload" has "dir permissions" = "777" and "dir owner" = "you . The personal folders that are created by IMCE: "dir permissions" = “775” and the "dir owner" = "webserver".

So i changed the personal folders for the users from “775” to "777" and the owner from "webserver” to you “you”, everything is fine: The users can upload their files.
But i don´t want to change this setting for every new user, who wants to upload something, so i search for a solution to set this automatically.

best regards

Jonas